Results 71 to 80 of about 47,748 (185)
Simulation of the cutter arrangement pattern of the arc PDC drill bit
, 2020 When drilling in a complex heterogeneous formation, due to the limitation of bit crown shape, the cutters of each part of the bit are subjected to non-uniform force, and the cutters at the local location are subjected to large impact load, which lead to ...
Chuanliu, WANG, Pei, JU
core +1 more source
Numerical Simulation on Rock-Breaking Performance of Prismatic PDC Cutter
Shiyou jixieConventional PDC bit exhibits severe wear,difficult penetration and low rate of penetration(ROP)in abrasive formations.Prismatic PDC cutter is superior to conventional planar PDC cutter in rock-breaking performance,but there is a lack of basis for the ...
Cheng Wei +4 more
doaj
Energy GeoscienceGeothermal energy is a clean and renewable energy with significant potential. During the drilling process of geothermal development, conventional drill bits often suffer from significant wear and severe cutter breakage.
Huaizhong Shi +5 more
doaj +1 more source
Androgens Modulate Tumor–Immune Interactions in Testicular Germ Cell Tumors
Andrology, EarlyView.ABSTRACT Background The majority of testicular germ cell tumors (TGCT) are derived from the germ cell neoplasia in situ and arise after puberty in the local presence of high levels of testosterone. The seminoma subtype features a rich inflammatory infiltrate which impacts tumor progression but the role of testosterone in shaping tumor–immune ...
Ida Hamann +6 more
wiley +1 more source
THE ANALYSIS OF PDC CUTTER CHARACTERISTIC IN HARD FORMATION DRILLING RELATING TO WEAR (BACK & SIDE RAKE ANGLE) [PDF]
, 2015 The project focuses on the optimization of Polycrystalline Diamond Compact (PDC) cutters characteristic features relating to wear for improvement on durability in drilling of hard formation.
Nasir Gathoth Subroto, Affan
core
Trends in Childhood Underweight in Norwegian Children: Data From Routine Child Healthcare, 2010–2022
Acta Paediatrica, EarlyView.ABSTRACT Aim This study examined age‐ and sex‐specific prevalence and trends in underweight among Norwegian children and adolescents during the pre‐pandemic period from 2010 to 2019 and COVID‐19 pandemic period from 2020 to 2022. Methods Height and weight data from 78 024 children aged 2 to 13 years in Bergen from 2010 to 2022 were obtained from public
Sara‐Rebekka Færø Linde +9 more
wiley +1 more source
scRNA‐Seq in Gastric Cancer Reveals Macrophage‐Derived C1q as a Diagnostic Marker
Cancer Science, EarlyView.Single‐cell sequencing of GC analyzed the tumor microenvironment and discovered the C1QA+ TAMs subpopulation with immunosuppressive function. The role of C1q in the prognosis and diagnosis of GC was demonstrated through plasma and tumor tissue from the GC cohort.
Saisai Gong +6 more
wiley +1 more source
Numerical and Simulation Analysis of PDC cutter Associated with the Rate of Penetration
, 2016 Since the introduction of Polycrystalline Diamond Compact (PDC) drill bit into the well drilling industry in 1976, the popularity of the PDC drill bit has grown steadily over the years and so are the efforts and research made to elevate its performance ...
Adam, Mohd Farid
core
Histopathology, EarlyView.SARIFA – characterized by direct tumour cell‐adipocyte contact – is a novel histological marker that is easily identifiable on standard haematoxylin–eosin‐stained sections and is associated with aggressive tumour behaviour. SARIFA positivity independently predicts poorer survival outcomes in non‐intestinal gastric cancer and may thus contribute to ...
Ákos Jakab +10 more
wiley +1 more source
, 2011 A new polycrystalline diamond compacts (PDC) cutter was designed and prepared. The new PDC cutter has fibers that are artificially ordered so as to have the desired geometric angles, and it has a larger number of the cutting edges, enough space for ...
G.F. Zhang +4 more
core +1 more source